Electrical welding.



T. E MURRAY.

ELECTRICAL WELDING.

APPLICATION FILED JUNE 28, 1916.

Patent-ed Aug. 29, 1916 mom a murmur, or m w' ronx, 1w. Y.

ELECTRICAL WELDING.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Original application fled February 18, 1918, Serial No. 79,050. Dividedand this application filed June 28, 1916. Serial No. 106,319.

To all whom it may concern:

Be it known that I, THOMAS E. MURRAY, a citizen of the United States,residing at New rk,"in the countyof New York and State 0 New York, haveinvented a certain new and useful Improvement in Electrical \Veldiug, ofwhich the following is a specification.

The invention relates to electrical welding, and consists in the methodhereinafter set forth, of butt-welding a tube to a plate, whereby anextra amount of metal is rovided for fusion at the joint, thus avoi ingthe melting of either the'tube or the plate.

The invention is. more particularly applicable to metal vehicle wheelshaving hollow spokes, in which there is, of course, a predetermineddefinite length of spoke between the hub and the rim. If the spoke bemade originally at this predetermined length,'it is obvious that thewelding operation at the outer end of the spoke causes a fusion of themetal either at the extremity of the spoke or at the plate or rim towhich that end may be joined-with the result that the joint is ofnecessity weakened. By my method, depending upon-the production of acircular rib of. additional metal upon the face of the plate or rim,ample metal is provided for fusion, and none of it need be taken fromeither, spoke or rim.with the consequence that a stronger and betterjointcis produced.-

This application is a division of my application for metal vehiclewheels, Serial No. 79,050, filed February 18, 1916.

In the accompanying drawings Figure 1 is a perspective view of a tubularspoke of thin metal. Fig.- 2 is-a plan view of a plate, to which one endof the spoke isto be welded, and which may form a flange on said spoke.Fig. 3 is a longitudinal section of spoke and plate, with the end of thespoke 1n contact with the circular rib on the plate. before welding.Fig. 4 is a similar section after the welding between spoke and plate iscompleted.

Similar letters of reference indicate like parts.

Ais a tubular spoke, or any other tube of thin metal.

B is a plate, to which the extremity of the tubeA is to be welded. Tothis end, I form upon the surface of plate B a circular rib C of themetal of the plate, and place the end of tube A in butt contact withsaid rib, as shown in Fig. 3. Upon the passage of the welding current,the rib C becomes fused,

v and homogeneously unites the tubular'spoke A and plate B. I may weldthe plate B directly to the under side of the rimof a metal vehiclewheel, or I may form the rib C directly upon said rim. The object of therib C is either case is to provide sufficient metal to form the weldedjoint, and thus to avoid taking the same from either the plat B or thetubular spoke A.

I claim: I

The method of butt-welding a tube -to a plate, which consists in formingon said plate a circular rib registering with the extremity of saidtube, placing the end of said tube in contact with said rib, and causina welding current to pass through the .jOlllt, whereby said rib ismelted to provide metal for unlting said tube and said plate. Intestimony whereof I have afiixed my signature in" presence of twoWitnesses.

- THOMAS E. MURRAY. Witnesses:

GEBTRUDE T. PORTER, MAY T. McGARRr.

